https://www.gibraltarport.com/schedules
Gibraltar shows Jewel 5/21/21, Explorer 5/13/21 (and several more times), Indy 6/8/21, Anthem 6/30/21 (and a few others), Jewel 8/30/21 and 4/13/22 along with Indy and Anthem in '22.
The Jewel re-deployment to Copenhagen and Stockholm appears to result in a northern route Transatlantic sailing that has not yet been announced. As Jewel will be replacing Brilliance in Boston on September 12th 2021, a 12 night Copenhagen to Iceland to Boston Transatlantic should be announced soon.
I had posted a few weeks ago on the 2022 thread that Jewel appeared to be the Copenhagen and Stockholm ship as well in 2022.
http://creative.rccl.com/Sales/Royal/Deployment/2